Edttard berneburg



LETTER FILE Filed Aug. 15. 1923 Jare /0r: Maw

May 26, 1925.

E. BERNEBURG 1n h nu N m udamsiiiiiiidm L z .K m f .k 2 mu Wine-$885Patented May 26, 1925.

UNITED STATES EDUARD BERN EBURG, 0F LEIPZIG, GERMANY.

LETTER FILE.

Application filed August 15, 1923.

T 0 all whom it may concern:

Be it known that I, EDUARD BERNEBURG, a citizen of the German Republic,and residing at Leipzig, Germany, have invented certain new and usefulImprovements in a Letter File, of which the following is aspecification.

This invention relates to improvements in letter files, of that knownkind comprising an upper and a lower cover of .one piece and having acommon back at which they are pressed together by means of a torsionalspring to clamp the letters filed therein, said spring having for thispurpose a plurality of tongues engaging the adjacent portions of saidcovers from the outside. The improvements consist: (a) in the provisionof small holes in said back through which binding wire is passed andtwined with the torsional spring so as to fix the lat ter in position onsaid back, (b) in making said tongues loop-shaped so as to preventdamage of the covers by the same.

In the accompanying drawing: Fig. 1 is a perspective view of a letterfile, while Figs. 2 and 3 are on a larger scale a crosssection through,and a fragmentary plan view of, the back of the letter file embodyingthe improvements.

The letter file comprises the two covers a, 6 preferably consisting ofone piece of paste board or the like folded three times at its middle at00, z, to form a common back 0 thereon which is somewhat bent inwards.The upper cover a. has near the back 0 a folding cl facilitating theopening of same, the part 6 between said folding and said cover underthe action of spring 7" (see below) serving to clamp thereunder theletters 0 to be filed. The covers are pressed together at the back 0 bymeans of a torsional spring f having tongues g which engage the upperand the lower cover for the Serial No. 657,527.

purpose intended and which are loop-shaped and integral with the springwires h of the torsional spring f, the tension of said torsional springbeing so determined that when the cover a is opened upon its folding clits rear part 6 can be somewhat lifted from the lower cover 6 againstthe spring action 6 so as to allow an insertion of the letters to befiled between both said covers :all this being already known in the art.

According to the present invention, small holes 2' are provided at thefoldings an, .2 in the back 0 of the letter file, binding wire 7c beingpassed from inside through each two adjacent holes i and twined with thespring wires h of the torsional spring f so as to fix the latter inposition on said back 0.

A strip m of any appropriate material stuck on the back 0 and over theadjacent portions of the coversa, 6 serves to cover the torsional springwith its engaging tongues so as to conceal the same from View.

What I claim, is

A letter file comprising, the combination with an upper and a'lowercover of one piece and having a common back, and a torsional spring onsaid back having integral loopshaped tongues engaging over the parts ofsaid covers adjacent to said back, of means to fix said torsional springin position on said back, and consisting of small holes in said back andbinding wire passed from inside through each two adjacent holes andtwined with said torsional spring, substantially as set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EDUARD BERNEBURG.

Witnesses RUDOLPH FRIOKE, WILLY STIER.

